/*!
 * Fairy Dust Cursor.js
 * - 90's cursors collection
 * -- https://github.com/tholman/90s-cursor-effects
 * -- http://codepen.io/tholman/full/jWmZxZ/
 */

(function fairyDustCursor () {

    var possibleColors = ["#D61C59", "#E7D84B", "#1B8798"]
    var width = window.innerWidth;
    var height = window.innerHeight;
    var cursor = { x: width / 2, y: width / 2 };
    var particles = [];
  
    function init () {
      bindEvents();
      loop();
    }
  
    // Bind events that are needed
    function bindEvents () {
      document.addEventListener('mousemove', onMouseMove);
      document.addEventListener('touchmove', onTouchMove);
      document.addEventListener('touchstart', onTouchMove);
  
      window.addEventListener('resize', onWindowResize);
    }
  
    function onWindowResize (e) {
      width = window.innerWidth;
      height = window.innerHeight;
    }
  
    function onTouchMove (e) {
      if (e.touches.length > 0) {
        for (var i = 0; i < e.touches.length; i++) {
          addParticle(e.touches[i].clientX, e.touches[i].clientY, possibleColors[Math.floor(Math.random() * possibleColors.length)]);
        }
      }
    }
  
    function onMouseMove (e) {
      cursor.x = e.clientX;
      cursor.y = e.clientY;
  
      addParticle(cursor.x, cursor.y, possibleColors[Math.floor(Math.random() * possibleColors.length)]);
    }
  
    function addParticle (x, y, color) {
      var particle = new Particle();
      particle.init(x, y, color);
      particles.push(particle);
    }
  
    function updateParticles () {
  
      // Updated
      for (var i = 0; i < particles.length; i++) {
        particles[i].update();
      }
  
      // Remove dead particles
      for (var i = particles.length - 1; i >= 0; i--) {
        if (particles[i].lifeSpan < 0) {
          particles[i].die();
          particles.splice(i, 1);
        }
      }
  
    }
  
    function loop () {
      requestAnimationFrame(loop);
      updateParticles();
    }
  
    /**
     * Particles
     */
  
    function Particle () {
  
      this.character = "*";
      this.lifeSpan = 120; //ms
      this.initialStyles = {
        "position": "fixed",
        "top": "0", //蹇呴』鍔�
        "display": "block",
        "pointerEvents": "none",
        "z-index": "10000000",
        "fontSize": "20px",
        "will-change": "transform"
      };
  
      // Init, and set properties
      this.init = function (x, y, color) {
  
        this.velocity = {
          x: (Math.random() < 0.5 ? -1 : 1) * (Math.random() / 2),
          y: 1
        };
  
        this.position = { x: x - 10, y: y - 20 };
        this.initialStyles.color = color;
        // console.log(color);
  
        this.element = document.createElement('span');
        this.element.innerHTML = this.character;
        applyProperties(this.element, this.initialStyles);
        this.update();
  
        document.body.appendChild(this.element);
      };
  
      this.update = function () {
        this.position.x += this.velocity.x;
        this.position.y += this.velocity.y;
        this.lifeSpan--;
  
        this.element.style.transform = "translate3d(" + this.position.x + "px," + this.position.y + "px,0) scale(" + (this.lifeSpan / 120) + ")";
      }
  
      this.die = function () {
        this.element.parentNode.removeChild(this.element);
      }
  
    }
  
    /**
     * Utils
     */
  
    // Applies css `properties` to an element.
    function applyProperties (target, properties) {
      for (var key in properties) {
        target.style[key] = properties[key];
      }
    }
  
    init();
  })();